Cisco 7975G Administration Guide - Page 26

Understanding Security Features for Cisco Unified IP Phones Chapter 1 An Overview of the Cisco Unified IP Phone Table 1-3 Overview of Security Features (continued) Feature Secure SRST reference (SCCP pohones only) Media encryption Signaling encryption CAPF (Certificate Authority Proxy Function) Security profiles Encrypted configuration files Optional disabling of the web server functionality for a phone Phone hardening 802.1X Authentication Description After you configure a SRST reference for security and then reset the dependent devices in Cisco Unified Communications Manager Administration, the TFTP server adds the SRST certificate to the phone cnf.xml file and sends the file to the phone. A secure phone then uses a TLS connection to interact with the SRST-enabled router. Uses SRTP to ensure that the media streams between supported devices proves secure and that only the intended device receives and reads the data. Includes creating a media master key pair for the devices, delivering the keys to the devices, and securing the delivery of the keys while the keys are in transport. Ensures that all SCCP signaling messages that are sent between the device and the Cisco Unified Communications Manager server are encrypted. Implements parts of the certificate generation procedure that are too processing-intensive for the phone, and it interacts with the phone for key generation and certificate installation. The CAPF can be configured to request certificates from customer-specified certificate authorities on behalf of the phone, or it can be configured to generate certificates locally. Defines whether the phone is nonsecure, authenticated, or encrypted. See the "Understanding Security Profiles" section on page 1-13 for more information. Lets you ensure the privacy of phone configuration files. You can prevent access to a phone's web page, which displays a variety of operational statistics for the phone. Additional security options, which you control from Cisco Unified Communications Manager Administration: • Disabling PC port • Disabling Gratuitous ARP (GARP) • Disabling PC Voice VLAN access • Disabling access to the Setting menus, or providing restricted access that allows access to the User Preferences menu and saving volume changes only • Disabling access to web pages for a phone. Note You can view current settings for the PC Port Disabled, GARP Enabled, and Voice VLAN enabled options by looking at the phone's Security Configuration menu. For more information, see the "Device Configuration Menu" section on page 4-10. The Cisco Unified IP Phone can use 802.1X authentication to request and gain access to the network. See the "Supporting 802.1X Authentication on Cisco Unified IP Phones" section on page 1-15 for more information. Related Topics • Understanding Security Profiles, page 1-13 • Identifying Encrypted and Authenticated Phone Calls, page 1-13 • Device Configuration Menu, page 4-10 1-12 Cisco Unified IP Phone 7975G Administration Guide for Cisco Unified Communications Manager 6.1 OL-14640-01